Comcast's new extreme Web service opens the door to more advanced Web surfing, things like downloading full-length movies in a matter of minutes. But the more users do, the more data they use. With Comcast imposing a bandwidth cap on users, how will users know when they're close to reaching that 250 gigabyte limit?

Comcast's new extreme Web service opens the door to more advanced Web surfing, things like downloading full-length movies in a matter of minutes. But the more users do, the more data they use. With Comcast imposing a bandwidth cap on users, how will users know when they're close to reaching that 250 gigabyte limit?

Comcast's speedier Internet--and its limitsZDNet Senior Editor Sam Diaz shares his take on Comcast's new wideband Internet service. He says the service will allow faster downloads of movies, but the company also needs to offer tools so users can track Internet usage since it is imposing a bandwidth cap at 250 gigabytes.

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